Heat pack



FIG. 1 is a front perspective view of a heat pack employing an ornamental design in accordance with the present invention;

FIG. 2 illustrates a front view thereof;

FIG. 3 illustrates a back view thereof;

FIG. 4 illustrates a bottom view thereof;

FIG. 5 illustrates a top view thereof;

FIG. 6 illustrates a left view of thereof;

FIG. 7 illustrates a right view thereof; and,

FIG. 8 illustrates a back perspective view thereof.

The broken line portions of FIGS. 1-8 are included to show unclaimed subject matter only and form no part of the claimed heat pack design.

The drawings are dotted to show features of the heat pack having a contrasting material, surface texture, color, or any combination thereof as compared to other features of the heat pack. 

CLAIM The ornamental design for a heat pack, as shown and described. 